Chemical Engineering MCQs

Page No. 215

Ratio of pressure and inertia force gives ______________ number?


aWeber


bMach


cEuler


dFroude


View Answer Euler

Most commonly used joint in the underground pipe lines is the________________?


aSleeve joint


bCoupling


cFlange


dExpansion joint


View Answer Sleeve joint

Gear pump_________________?


aIs a positive displacement pump


bIs a centrifugal pump


cIs a non-positive displacement pump


dCan be started with delivery valve closed



For a particle settling in water at its terminal settling velocity, which of the following is true ?


aBuoyancy = weight + drag


bWeight = buoyancy + drag


cDrag = buoyancy + weight


dDrag = weight



In a fully turbulent flow (Re > 105) in a pipe of diameter ‘d’, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is_______________?


ad


bd2


cd2.5


dd4


View Answer d2.5

______________ pumps are axial flow pumps?


aTurbine


bPropeller


cDiffuser


dNone of these


View Answer Propeller

Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time’t’. α = a co-efficient to be experimentally determined) ?


aε = ε0 + α.t


bε = ε0 + α.t2


cε = ε0 + α.t3


dε = ε0 + α.t4


View Answer ε = ε0 + α.t

The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is_____________________?


a0.5


b1


c1.5


d2


View Answer 2

Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________?


aIncrease


bDecrease


cRemain same


dData insufficient to predict pressure drop


View Answer Increase

Which of the following denotes the effect of compressibility in fluid flow ?


aWeber number


bMach number


cEuler number


dReynolds number


View Answer Mach number

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